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1 /* | |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #include "bindings/core/v8/CustomElementConstructorBuilder.h" | |
32 | |
33 #include "bindings/core/v8/CustomElementBinding.h" | |
34 #include "bindings/core/v8/DOMWrapperWorld.h" | |
35 #include "bindings/core/v8/ExceptionState.h" | |
36 #include "bindings/core/v8/V8Binding.h" | |
37 #include "bindings/core/v8/V8Document.h" | |
38 #include "bindings/core/v8/V8HTMLElement.h" | |
39 #include "bindings/core/v8/V8HiddenValue.h" | |
40 #include "bindings/core/v8/V8PerContextData.h" | |
41 #include "bindings/core/v8/V8SVGElement.h" | |
42 #include "core/HTMLNames.h" | |
43 #include "core/SVGNames.h" | |
44 #include "core/dom/Document.h" | |
45 #include "core/dom/ElementRegistrationOptions.h" | |
46 #include "core/dom/custom/CustomElementDefinition.h" | |
47 #include "core/dom/custom/CustomElementDescriptor.h" | |
48 #include "core/dom/custom/CustomElementException.h" | |
49 #include "core/dom/custom/CustomElementProcessingStack.h" | |
50 #include "wtf/Assertions.h" | |
51 | |
52 namespace blink { | |
53 | |
54 static void constructCustomElement(const v8::FunctionCallbackInfo<v8::Value>&); | |
55 | |
56 CustomElementConstructorBuilder::CustomElementConstructorBuilder(ScriptState* sc
riptState, const ElementRegistrationOptions& options) | |
57 : m_scriptState(scriptState) | |
58 , m_options(options) | |
59 { | |
60 ASSERT(m_scriptState->context() == m_scriptState->isolate()->GetCurrentConte
xt()); | |
61 } | |
62 | |
63 bool CustomElementConstructorBuilder::isFeatureAllowed() const | |
64 { | |
65 return m_scriptState->world().isMainWorld(); | |
66 } | |
67 | |
68 bool CustomElementConstructorBuilder::validateOptions(const AtomicString& type,
QualifiedName& tagName, ExceptionState& exceptionState) | |
69 { | |
70 ASSERT(m_prototype.IsEmpty()); | |
71 | |
72 v8::TryCatch tryCatch(m_scriptState->isolate()); | |
73 | |
74 if (!m_scriptState->perContextData()) { | |
75 // FIXME: This should generate an InvalidContext exception at a later po
int. | |
76 CustomElementException::throwException(CustomElementException::ContextDe
stroyedCheckingPrototype, type, exceptionState); | |
77 tryCatch.ReThrow(); | |
78 return false; | |
79 } | |
80 | |
81 if (m_options.hasPrototype()) { | |
82 ASSERT(m_options.prototype().isObject()); | |
83 m_prototype = m_options.prototype().v8Value().As<v8::Object>(); | |
84 } else { | |
85 m_prototype = v8::Object::New(m_scriptState->isolate()); | |
86 v8::Local<v8::Object> basePrototype = m_scriptState->perContextData()->p
rototypeForType(&V8HTMLElement::wrapperTypeInfo); | |
87 if (!basePrototype.IsEmpty()) { | |
88 if (!v8CallBoolean(m_prototype->SetPrototype(m_scriptState->context(
), basePrototype))) | |
89 return false; | |
90 } | |
91 } | |
92 | |
93 AtomicString namespaceURI = HTMLNames::xhtmlNamespaceURI; | |
94 if (hasValidPrototypeChainFor(&V8SVGElement::wrapperTypeInfo)) | |
95 namespaceURI = SVGNames::svgNamespaceURI; | |
96 | |
97 ASSERT(!tryCatch.HasCaught()); | |
98 | |
99 AtomicString localName; | |
100 | |
101 if (m_options.hasExtends()) { | |
102 localName = AtomicString(m_options.extends().lower()); | |
103 | |
104 if (!Document::isValidName(localName)) { | |
105 CustomElementException::throwException(CustomElementException::Exten
dsIsInvalidName, type, exceptionState); | |
106 tryCatch.ReThrow(); | |
107 return false; | |
108 } | |
109 if (CustomElement::isValidName(localName)) { | |
110 CustomElementException::throwException(CustomElementException::Exten
dsIsCustomElementName, type, exceptionState); | |
111 tryCatch.ReThrow(); | |
112 return false; | |
113 } | |
114 } else { | |
115 if (namespaceURI == SVGNames::svgNamespaceURI) { | |
116 CustomElementException::throwException(CustomElementException::Exten
dsIsInvalidName, type, exceptionState); | |
117 tryCatch.ReThrow(); | |
118 return false; | |
119 } | |
120 localName = type; | |
121 } | |
122 | |
123 ASSERT(!tryCatch.HasCaught()); | |
124 tagName = QualifiedName(nullAtom, localName, namespaceURI); | |
125 return true; | |
126 } | |
127 | |
128 CustomElementLifecycleCallbacks* CustomElementConstructorBuilder::createCallback
s() | |
129 { | |
130 ASSERT(!m_prototype.IsEmpty()); | |
131 | |
132 v8::TryCatch exceptionCatcher(m_scriptState->isolate()); | |
133 exceptionCatcher.SetVerbose(true); | |
134 | |
135 v8::MaybeLocal<v8::Function> created = retrieveCallback("createdCallback"); | |
136 v8::MaybeLocal<v8::Function> attached = retrieveCallback("attachedCallback")
; | |
137 v8::MaybeLocal<v8::Function> detached = retrieveCallback("detachedCallback")
; | |
138 v8::MaybeLocal<v8::Function> attributeChanged = retrieveCallback("attributeC
hangedCallback"); | |
139 | |
140 m_callbacks = V8CustomElementLifecycleCallbacks::create(m_scriptState.get(),
m_prototype, created, attached, detached, attributeChanged); | |
141 return m_callbacks.get(); | |
142 } | |
143 | |
144 v8::MaybeLocal<v8::Function> CustomElementConstructorBuilder::retrieveCallback(c
onst char* name) | |
145 { | |
146 v8::Local<v8::Value> value; | |
147 if (!m_prototype->Get(m_scriptState->context(), v8String(m_scriptState->isol
ate(), name)).ToLocal(&value) || !value->IsFunction()) | |
148 return v8::MaybeLocal<v8::Function>(); | |
149 return v8::MaybeLocal<v8::Function>(value.As<v8::Function>()); | |
150 } | |
151 | |
152 bool CustomElementConstructorBuilder::createConstructor(Document* document, Cust
omElementDefinition* definition, ExceptionState& exceptionState) | |
153 { | |
154 ASSERT(!m_prototype.IsEmpty()); | |
155 ASSERT(m_constructor.IsEmpty()); | |
156 ASSERT(document); | |
157 | |
158 v8::Isolate* isolate = m_scriptState->isolate(); | |
159 v8::Local<v8::Context> context = m_scriptState->context(); | |
160 | |
161 if (!prototypeIsValid(definition->descriptor().type(), exceptionState)) | |
162 return false; | |
163 | |
164 const CustomElementDescriptor& descriptor = definition->descriptor(); | |
165 | |
166 v8::Local<v8::String> v8TagName = v8String(isolate, descriptor.localName()); | |
167 v8::Local<v8::Value> v8Type; | |
168 if (descriptor.isTypeExtension()) | |
169 v8Type = v8String(isolate, descriptor.type()); | |
170 else | |
171 v8Type = v8::Null(isolate); | |
172 | |
173 v8::Local<v8::Object> data = v8::Object::New(isolate); | |
174 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementDocument(isolate), toV8(document, context->Global(), isolate)); | |
175 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementNamespaceURI(isolate), v8String(isolate, descriptor.namespaceURI())); | |
176 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementTagName(isolate), v8TagName); | |
177 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementType(isolate), v8Type); | |
178 | |
179 v8::Local<v8::FunctionTemplate> constructorTemplate = v8::FunctionTemplate::
New(isolate); | |
180 constructorTemplate->SetCallHandler(constructCustomElement, data); | |
181 if (!constructorTemplate->GetFunction(context).ToLocal(&m_constructor)) { | |
182 CustomElementException::throwException(CustomElementException::ContextDe
stroyedRegisteringDefinition, definition->descriptor().type(), exceptionState); | |
183 return false; | |
184 } | |
185 | |
186 m_constructor->SetName(v8Type->IsNull() ? v8TagName : v8Type.As<v8::String>(
)); | |
187 | |
188 v8::Local<v8::String> prototypeKey = v8String(isolate, "prototype"); | |
189 if (!v8CallBoolean(m_constructor->HasOwnProperty(context, prototypeKey))) | |
190 return false; | |
191 // This sets the property *value*; calling Set is safe because | |
192 // "prototype" is a non-configurable data property so there can be | |
193 // no side effects. | |
194 if (!v8CallBoolean(m_constructor->Set(context, prototypeKey, m_prototype))) | |
195 return false; | |
196 // This *configures* the property. DefineOwnProperty of a function's | |
197 // "prototype" does not affect the value, but can reconfigure the | |
198 // property. | |
199 if (!v8CallBoolean(m_constructor->DefineOwnProperty(context, prototypeKey, m
_prototype, v8::PropertyAttribute(v8::ReadOnly | v8::DontEnum | v8::DontDelete))
)) | |
200 return false; | |
201 | |
202 v8::Local<v8::String> constructorKey = v8String(isolate, "constructor"); | |
203 v8::Local<v8::Value> constructorPrototype; | |
204 if (!m_prototype->Get(context, constructorKey).ToLocal(&constructorPrototype
)) | |
205 return false; | |
206 | |
207 if (!v8CallBoolean(m_constructor->SetPrototype(context, constructorPrototype
))) | |
208 return false; | |
209 | |
210 V8HiddenValue::setHiddenValue(m_scriptState.get(), m_prototype, V8HiddenValu
e::customElementIsInterfacePrototypeObject(isolate), v8::True(isolate)); | |
211 if (!v8CallBoolean(m_prototype->DefineOwnProperty(context, v8String(isolate,
"constructor"), m_constructor, v8::DontEnum))) | |
212 return false; | |
213 | |
214 return true; | |
215 } | |
216 | |
217 bool CustomElementConstructorBuilder::prototypeIsValid(const AtomicString& type,
ExceptionState& exceptionState) const | |
218 { | |
219 if (m_prototype->InternalFieldCount() || !V8HiddenValue::getHiddenValue(m_sc
riptState.get(), m_prototype, V8HiddenValue::customElementIsInterfacePrototypeOb
ject(m_scriptState->isolate())).IsEmpty()) { | |
220 CustomElementException::throwException(CustomElementException::Prototype
InUse, type, exceptionState); | |
221 return false; | |
222 } | |
223 | |
224 v8::PropertyAttribute propertyAttribute; | |
225 if (!v8Call(m_prototype->GetPropertyAttributes(m_scriptState->context(), v8S
tring(m_scriptState->isolate(), "constructor")), propertyAttribute) || (property
Attribute & v8::DontDelete)) { | |
226 CustomElementException::throwException(CustomElementException::Construct
orPropertyNotConfigurable, type, exceptionState); | |
227 return false; | |
228 } | |
229 | |
230 return true; | |
231 } | |
232 | |
233 bool CustomElementConstructorBuilder::didRegisterDefinition() const | |
234 { | |
235 ASSERT(!m_constructor.IsEmpty()); | |
236 | |
237 return m_callbacks->setBinding(CustomElementBinding::create(m_scriptState->i
solate(), m_prototype)); | |
238 } | |
239 | |
240 ScriptValue CustomElementConstructorBuilder::bindingsReturnValue() const | |
241 { | |
242 return ScriptValue(m_scriptState.get(), m_constructor); | |
243 } | |
244 | |
245 bool CustomElementConstructorBuilder::hasValidPrototypeChainFor(const WrapperTyp
eInfo* type) const | |
246 { | |
247 v8::Local<v8::Object> elementPrototype = m_scriptState->perContextData()->pr
ototypeForType(type); | |
248 if (elementPrototype.IsEmpty()) | |
249 return false; | |
250 | |
251 v8::Local<v8::Value> chain = m_prototype; | |
252 while (!chain.IsEmpty() && chain->IsObject()) { | |
253 if (chain == elementPrototype) | |
254 return true; | |
255 chain = chain.As<v8::Object>()->GetPrototype(); | |
256 } | |
257 | |
258 return false; | |
259 } | |
260 | |
261 static void constructCustomElement(const v8::FunctionCallbackInfo<v8::Value>& in
fo) | |
262 { | |
263 v8::Isolate* isolate = info.GetIsolate(); | |
264 | |
265 if (!info.IsConstructCall()) { | |
266 V8ThrowException::throwTypeError(isolate, "DOM object constructor cannot
be called as a function."); | |
267 return; | |
268 } | |
269 | |
270 if (info.Length() > 0) { | |
271 V8ThrowException::throwTypeError(isolate, "This constructor should be ca
lled without arguments."); | |
272 return; | |
273 } | |
274 | |
275 ScriptState* scriptState = ScriptState::current(isolate); | |
276 v8::Local<v8::Object> data = v8::Local<v8::Object>::Cast(info.Data()); | |
277 Document* document = V8Document::toImpl(V8HiddenValue::getHiddenValue(script
State, data, V8HiddenValue::customElementDocument(isolate)).As<v8::Object>()); | |
278 TOSTRING_VOID(V8StringResource<>, namespaceURI, V8HiddenValue::getHiddenValu
e(scriptState, data, V8HiddenValue::customElementNamespaceURI(isolate))); | |
279 TOSTRING_VOID(V8StringResource<>, tagName, V8HiddenValue::getHiddenValue(scr
iptState, data, V8HiddenValue::customElementTagName(isolate))); | |
280 v8::Local<v8::Value> maybeType = V8HiddenValue::getHiddenValue(scriptState,
data, V8HiddenValue::customElementType(isolate)); | |
281 TOSTRING_VOID(V8StringResource<>, type, maybeType); | |
282 | |
283 ExceptionState exceptionState(ExceptionState::ConstructionContext, "CustomEl
ement", info.Holder(), info.GetIsolate()); | |
284 CustomElementProcessingStack::CallbackDeliveryScope deliveryScope; | |
285 Element* element = document->createElementNS(namespaceURI, tagName, maybeTyp
e->IsNull() ? nullAtom : type, exceptionState); | |
286 if (exceptionState.throwIfNeeded()) | |
287 return; | |
288 v8SetReturnValueFast(info, element, document); | |
289 } | |
290 | |
291 } // namespace blink | |
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